<script setup>
  import { userRegisterService, userLoginService } from '@/api/user.js'
  import { User, Lock } from '@element-plus/icons-vue'
  import { ref, watch } from 'vue'
  import { useUserStore } from '@/stores'
  import { useRouter } from 'vue-router'
  const isRegister = ref(false)

  // 注册
  // 整个的用于提交的form数据对象
  const formModel = ref({
    username: '',
    password: '',
    repassword: ''
  })
  // 整个表单的校验规则 blur失去焦点触发 ， change改变时校验
  // 1.非空校验 required非空校验 message消息提示 ，triggetr触发校验的时机 blur change
  // 2.长度校验
  // 3.正则校验 pattern:正则规则 \S 非空字符
  // 4.自定义校验规则
  //   (1)rule 当前校验规则相关的信息
  //   (2)value 所校验的表单元素相关的表单值
  //   (3)callback 无论成功还是失败都需要callback回调
  //      -callback()       校验成功
  //      -callback(new Error(错误信息))  校验失败

  const rules = {
    username: [{ required: true, message: '请输入用户名', trigger: 'blur' },
    { min: 5, max: 10, message: '用户名必须是5-10位的字符', trigger: 'blur' }
    ],
    password: [
      { required: true, message: '请输入密码', trigger: 'blur' },
      { pattern: /^\S{6,15}$/, message: '密码必须是6-15位的非空字符', trigger: 'blur' },
    ],
    repassword: [
      { required: true, message: '请再次输入密码', trigger: 'blur' },
      {
        validator: (rule, value, callback) => {
          // 判断value 和当前form 中收集的 password 是否一致
          if (value !== formModel.value.password) {
            callback(new Error('两次输入的密码不一致！'))
          }
          else {
            callback()
          }
        }, trigger: 'blur'
      }
    ]
  }

  const form = ref()
  const router = useRouter()
  const register = async () => {
    // 注册成功之前，先进行校验，校验成功 ->请求 ,校验失败->自动提示
    await form.value.validate()
    await userRegisterService(formModel.value)
    ElMessage.success('注册成功')
    isRegister.value = false
  }
  const userStore = useUserStore()
  const login = async () => {
    await form.value.validate()
    const res = await userLoginService(formModel.value)
    userStore.setToken(res.data.token)
    ElMessage.success('登录成功')
    router.push('/')
  }

  watch(isRegister, () => {
    formModel.value = {
      username: '',
      password: '',
      repassword: ''
    }
  })
</script>

<template>
  <!-- 1.结构相关
    el-row表示一行，一行分为24份
  el-col表示列
    (1) :span="12" 表示在一行中，占12份（50%）
    (2) :span="6" 表示在一行中，占12份（25%）
    (3) :offset="3" 表示在一行中，左侧margin份数

    el-form 整个表单组件
    el-form-item 表单的一行 （一个表单域）
    el-input 表单元素 （输入框）
 -->
  <!-- 
    校验相关
    (1) el-form => :model="ruleForm" 绑定整个form的数据对象 {name,age,sex}
    (2) el-form => :rules="rules" 绑定整个rules规则对象     {name,age,sex}
    (3) 表单元素 => v-model="ruleForm.xxx" 给表单元素，绑定form的子属性
    (4) el-form-item prop配置生效的是哪个校验规则(和rules中的字段要对应)
  -->
  <el-row class="login-page">
    <el-col :span="12" class="bg"></el-col>
    <el-col :span="6" :offset="3" class="form">
      <el-form :model='formModel' :rules='rules' ref="form" size="large" autocomplete="off" v-if="isRegister">
        <el-form-item>
          <h1>注册</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="formModel.password" :prefix-icon="Lock" type="password" placeholder="请输入密码"></el-input>
        </el-form-item>
        <el-form-item prop="repassword">
          <el-input v-model="formModel.repassword" :prefix-icon="Lock" type="password" placeholder="请输入再次密码"></el-input>
        </el-form-item>
        <el-form-item>
          <el-button @click="register" class="button" type="primary" auto-insert-space>
            注册
          </el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = false">
            ← 返回
          </el-link>
        </el-form-item>
      </el-form>
      <el-form :model="formModel" :rules="rules" ref="form" size="large" autocomplete="off" v-else>
        <el-form-item>
          <h1>登录</h1>
        </el-form-item>
        <el-form-item prop="username">
          <el-input v-model="formModel.username" :prefix-icon="User" placeholder="请输入用户名"></el-input>
        </el-form-item>
        <el-form-item prop="password">
          <el-input v-model="formModel.password" name="password" :prefix-icon="Lock" type="password"
            placeholder="请输入密码"></el-input>
        </el-form-item>
        <el-form-item class="flex">
          <div class="flex">
            <el-checkbox>记住我</el-checkbox>
            <el-link type="primary" :underline="false">忘记密码？</el-link>
          </div>
        </el-form-item>
        <el-form-item>
          <el-button @click="login" class="button" type="primary" auto-insert-space>登录</el-button>
        </el-form-item>
        <el-form-item class="flex">
          <el-link type="info" :underline="false" @click="isRegister = true">
            注册 →
          </el-link>
        </el-form-item>
      </el-form>
    </el-col>
  </el-row>
</template>

<style lang="scss" scoped>
  .login-page {
    height: 100vh;
    background-color: #fff;

    .bg {
      background: url('@/assets/logo2.png') no-repeat 60% center / 240px auto,
        url('@/assets/login_bg.jpg') no-repeat center / cover;
      border-radius: 0 20px 20px 0;
    }

    .form {
      display: flex;
      flex-direction: column;
      justify-content: center;
      user-select: none;

      .title {
        margin: 0 auto;
      }

      .button {
        width: 100%;
      }

      .flex {
        width: 100%;
        display: flex;
        justify-content: space-between;
      }
    }
  }
</style>